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Finding the Fourth Proportional to 68,438.95, 102,658.42 and 25,752.40

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Solution

The fourth proportional to 68,438.95, 102,658.42 and 25,752.40 is: 38,628.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,438.95 : 102,658.42 = 25,752.40 : x
  2. Step 2: Convert to fraction form
    68,438.95/102,658.42 = 25,752.40/x
  3. Step 3: Cross multiply
    68,438.95x = 102,658.42 × 25,752.40
  4. Step 4: Simplify right side
    68,438.95x = 2,643,700,695.21
  5. Step 5: Solve for x
    x = 2,643,700,695.21/68,438.95
  6. Step 6: Final answer
    x = 38,628.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.